Columbus Compass Integrated Head Set 1-1/2”

Head Set Standard IS42-28.6/IS52-40 1-1/8” Upper 1-1/2” Lower 45° Stainless Steel ACB Carbon Gap Cap Upper Stack Height 16mm Lower Stack Height 0.8mm Head Tube O.D. Ø 46mm/56mm Head Tube I.D. Ø 41.8mm/52mm